When i feel the urge to fart, this brown diarrhoea liquid substance comes out. what is it and how do i get rid of it?

Feces: this is liquid feces which seeps around any solid stool in your rectum. Normally the anorectal structure can miraculously allow gas to be released instead of stool when we want to pass gas, but if your stools become too soft and liquid the latter may seep out. If your stools are always too loose, avoid insoluble roughage and take metamucil to firm up your stools.